CN210265124U - Compressor with a compressor housing having a plurality of compressor blades - Google Patents

Abstract

The utility model discloses a compressor is fixed in the inner peripheral surface of closed container with the compression mechanism of compressed fluid, in the outer peripheral face that contacts with the inner peripheral surface of closed container in compression mechanism, be formed with a plurality of convex parts that extend along circumference in the interval of leaving in circumference, closed container has at the inner peripheral face be formed with a plurality of gomphosis concave parts that supply a plurality of convex parts gomphosis, and be used for the structure of the guide concave part of compression mechanism's convex part to gomphosis concave part guide during manufacture, the guide concave part extends along the axial from the open end of the closed container of tube-shape, and communicate in the circumference for the gomphosis concave part at the extension tip, compression mechanism is fixed in the inner peripheral surface of closed container under the state of compression mechanism's convex part.

Description

Compressor with a compressor housing having a plurality of compressor blades

Technical Field

The present invention relates to a compressor suitable for an air conditioner or a refrigeration apparatus and the like, and a method for manufacturing the same.

Background

The compressor includes, in a sealed container: the compressor includes a motor and a compression mechanism driven by the motor and compressing refrigerant gas. The compression mechanism is fixed to the inner peripheral surface of the closed casing by spot welding (see, for example, patent document 1).

Patent document 1: japanese patent laid-open publication No. 2015-34540

In patent document 1, although the compression mechanism and the sealed container are fixed by spot welding, in this fixing method, deformation occurs due to local thermal shock at the time of welding, and therefore, refrigerant gas leaks from the deformed position, thereby degrading performance.

SUMMERY OF THE UTILITY MODEL

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a compressor in which deformation due to local thermal shock is suppressed at a fixed portion between a compression mechanism and a sealed container, and a method for manufacturing the same.

The utility model discloses a compressor is the compressor of the inner peripheral surface that is fixed in airtight container with the compression mechanism of compressed fluid, in the outer peripheral face with airtight container's inner peripheral surface contact in compression mechanism, is formed with a plurality of convex parts that extend along circumference in the upwards spaced of leaving, and airtight container has a structure: namely, the inner peripheral surface is formed with: the compression mechanism is fixed to the inner peripheral surface of the sealed container in a state where the convex portion of the compression mechanism is fitted in the fitting concave portion.

Preferably, the compression mechanism includes: a rotary compression mechanism includes a cylinder block having a cylinder chamber and a rotary piston eccentrically rotating in the cylinder chamber, and a projection is formed on an outer peripheral surface of the cylinder block.

According to the present invention, the closed casing and the compression mechanism are fixed to each other by the concave-convex structure of the fitting concave portion and the convex portion, and therefore, deformation caused by local thermal shock at the fixing portion of the compression mechanism and the closed casing can be suppressed.

Drawings

Fig. 1 is a schematic longitudinal sectional view of a compressor according to embodiment 1 of the present invention.

Fig. 2 is a sectional view a-a of fig. 1.

Fig. 3 is a side view showing a part of the cylinder block of fig. 1.

Fig. 4 is a longitudinal sectional view of the main body of the hermetic container of fig. 1.

Fig. 5 is a partial perspective view of the sealed container of fig. 1 as viewed from the inner peripheral surface side.

Fig. 6 is a sectional view of a fixing structure of the hermetic container and the cylinder of fig. 1.

Fig. 7 is a developed view of the inner peripheral surface of the sealed container for explaining the method of manufacturing the sealed container of fig. 1.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals. In the description of the embodiments, the description of the same or corresponding portions will be omitted or simplified as appropriate. In the description of the embodiments, the arrangement of "up" and "down" is described for convenience of description only, and is not limited to the arrangement of devices, components, and the like. The material, shape, size, and the like of the components and the like of the device can be appropriately changed within the scope of the present invention.

Embodiment 1.

Fig. 1 is a schematic longitudinal sectional view of a compressor according to embodiment 1 of the present invention.

The compressor 1 includes: a closed casing 2, a compression mechanism 3 disposed in the closed casing 2 for compressing and discharging a fluid such as a refrigerant, and a motor 4. The motor 4 includes a substantially cylindrical stator 5 and a substantially cylindrical rotor 6.

The compressor 1 is a single-rotation type compressor of a vertical high-pressure dome type, and a compression mechanism 3 is disposed below and a motor 4 is disposed above in a closed casing 2. The compression mechanism 3 is driven by a rotor 6 of the motor 4 via a crankshaft 7.

The sealed container 2 has a structure in which an upper lid 2a, a cylindrical body 2b, and a lower lid 2c are joined together. An intake pipe 22 for taking in gas is attached to a side surface of the main body 2b, and a discharge pipe 24 for discharging compressed gas is attached to an upper surface of the upper cover 2 a. The gas refrigerant discharged from the compression mechanism 3 is discharged from the space in the closed casing 2 to an external refrigerant circuit through the discharge pipe 24.

As the fluid circulating through the refrigerant circuit, any refrigerant such as R407C refrigerant, R410A refrigerant, R1234yf refrigerant, or the like can be used.

A terminal 32 connected to an external power source such as an inverter is attached to the upper surface of the upper cover 2a of the sealed container 2. The terminal 32 is, for example, a glass terminal. The terminal 32 is fixed to the sealed container 2 by welding, for example. The lead 28 from the motor 4 is connected to the terminal 32. Then, electric power from an external power source is supplied from the terminal 32 to the stator 5 of the motor 4 via the lead wire 28, and the motor 4 is driven to rotate the crankshaft 7.

The compression mechanism 3 is a rotary compression mechanism, and includes: a cylinder block 8, a rotary piston 9, vanes 10 (see fig. 2 described later), a main bearing 11 having a substantially inverted T-shape in a side view, and a sub-bearing 12 having a substantially inverted T-shape in a side view, which are attached to the inner periphery of the closed casing 2.

The cylinder 8 is formed of a flat plate, and a through hole is formed substantially at the center thereof in the upward direction. The upper side of the through hole is closed by a main bearing 11, the lower side of the through hole is closed by a sub bearing 12, and a cylinder chamber 13 is formed in the cylinder block 8. The rotary piston 9 is disposed in the cylinder chamber 13. The cylinder 8 is fixed to the closed casing 2 in a state where the outer peripheral surface thereof is in contact with the inner peripheral surface of the closed casing 2. The fixing structure will be described in detail later.

The crankshaft 7 includes a main shaft portion 18 constituting an upper portion of the crankshaft 7, an auxiliary shaft portion 19 constituting a lower portion of the crankshaft 7, and an eccentric shaft portion 16 formed between the main shaft portion 18 and the auxiliary shaft portion 19. The eccentric shaft portion 16 is located in the cylinder chamber 13 of the cylinder block 8. The main shaft portion 18 of the crankshaft 7 is rotatably supported by the main bearing 11, and the auxiliary shaft portion 19 is rotatably supported by the auxiliary bearing 12.

The rotary piston 9 is annular. The rotary piston 9 is slidably fitted to an eccentric shaft portion 16 of the crankshaft 7. The rotary piston 9 rotates eccentrically in the cylinder chamber 13. The rotary piston 9 eccentrically rotates in the cylinder chamber 13, and the eccentric shaft portion 16 of the crankshaft 7 eccentrically rotates in the cylinder chamber 13. An appropriate gap is provided in the cylinder chamber 13 to cause thermal expansion or the like in the height direction of the rotary piston 9.

The cylinder block 8 is formed with vane grooves 14 (see fig. 2 described later) that penetrate in the radial direction. The radially inner end of the vane groove 14 communicates with the cylinder chamber 13. A back pressure chamber 15 (see fig. 2 described later) is formed in the cylinder 8 at an end portion on the radially outer side of the vane groove 14. The back pressure chamber 15 is a substantially circular space in plan view, and communicates with the vane groove 14.

The blade 10 is provided in the blade groove 14 so as to be able to advance and retreat. The shape of the blade 10 is a flat, substantially rectangular parallelepiped. The vane 10 is always pressed against the rotary piston 9 by a vane spring 17 provided in the back pressure chamber 15, and divides the cylinder chamber 13 into a low-pressure suction chamber and a high-pressure compression chamber. The back pressure chamber 15 communicates with the inside of the closed casing 2 and directly receives the pressure inside the closed casing 2. Therefore, during operation of the compressor 1, the inside of the closed casing 2 becomes high pressure, and the back pressure chamber 15 also becomes high pressure, and the vane 10 is pressed against the rotary piston 9 by the differential pressure between the back pressure chamber 15 and the cylinder chamber 13 and the spring pressure of the vane spring 17. Therefore, the vane spring 17 is used mainly for the purpose of pressing the vane 10 against the rotary piston 9 at the time of starting the compressor 1 in which there is no pressure difference between the pressure in the closed casing 2 and the pressure in the cylinder chamber 13.

Further, the cylinder block 8 is provided with a suction port (not shown) through which gas refrigerant is sucked from the refrigerant circuit. The suction port penetrates the cylinder chamber 13 from the outer peripheral surface of the cylinder block 8.

The cylinder block 8 is provided with a discharge port (not shown) for discharging the compressed refrigerant from the cylinder chamber 13. The discharge port is formed by cutting out the upper end surface of the cylinder 8. The discharge port communicates with a discharge port (not shown) formed in the main bearing 11, and a discharge valve (not shown) that opens when a predetermined pressure or higher is reached in the cylinder chamber 13 is disposed at the discharge port. Further, a discharge muffler 20 is attached to the main bearing 11 so as to cover the discharge valve. The high-temperature and high-pressure gas refrigerant discharged through the discharge valve enters the discharge muffler 20 once, and is then discharged from the discharge muffler 20 into the space in the closed casing 2. The discharge valve and the discharge muffler 20 may be provided in the sub-bearing 12, or may be provided in both the main bearing 11 and the sub-bearing 12.

The material of the cylinder block 8, the main bearing 11, and the sub-bearing 12 is gray cast iron, sintered steel, carbon steel, or the like. The material of the rotary piston 9 is, for example, alloy steel containing chromium or the like. The material of the blade 10 is, for example, high-speed tool steel.

A suction muffler 21 is disposed beside the closed casing 2. The main body of suction muffler 21 is fixed to the side surface of hermetic container 2 by welding or the like. The suction muffler 21 sucks low-pressure gas refrigerant from the refrigerant circuit. The suction muffler 21 suppresses direct entry of the liquid refrigerant into the cylinder chamber 13 of the cylinder block 8 when the liquid refrigerant returns to the compressor 1. The suction muffler 21 is connected to a suction port of the cylinder 8 via a suction pipe 22.

A refrigerating machine oil 23 for lubricating the sliding portions of the compression mechanism 3 is stored in the bottom portion of the closed casing 2. The refrigerating machine oil 23 is sucked by an oil pump provided at a lower portion of the crankshaft 7 in accordance with the rotation of the crankshaft 7, moves to each sliding portion of the compression mechanism 3, and lubricates the sliding portion. For the refrigerator oil 23, for example, POE (polyol ester), PVE (polyvinyl ether), and AB (alkylbenzene) can be used as synthetic oils.

The details of the motor 4 will be described below.

In embodiment 1, the electric motor 4 is a brushless DC (Direct Current) motor. The present embodiment 1 can be applied to the electric motor 4 even if it is a motor other than a brushless DC motor, such as an induction motor. The electric motor 4 is a concentrated winding motor. The present embodiment 1 can be applied to the electric motor 4 even if it is a distributed winding motor.

The stator 5 of the motor 4 is fixed in contact with the inner peripheral surface of the sealed container 2. The rotor 6 is disposed inside the stator 5 with a gap of about 0.3 to 1 mm.

The stator 5 includes a stator core 25 and a winding 26. The stator core 25 is manufactured by punching a plurality of electromagnetic steel sheets having a thickness of 0.1 to 1.5mm, which contain iron as a main component, into a predetermined shape, laminating the sheets in the axial direction, and fixing the sheets to each other by caulking, welding, or the like. The winding 26 is wound around the stator core 25 in a concentrated winding manner via an insulating member 27. The winding 26 is composed of a core wire and at least one coating film covering the core wire. The core wire is made of copper, for example. The material of the coating is, for example, AI (amide imide) or EI (ester imide). The insulating member 27 is made of, for example, PET (polyethylene terephthalate), PBT (polybutylene terephthalate), or phenol resin. The other end of the wire 28, one end of which is connected to the terminal 32, is connected to the winding 26.

The rotor 6 includes a rotor core 29 and a plurality of permanent magnets, not shown. The rotor core 29 is manufactured by punching a plurality of electromagnetic steel sheets having a thickness of 0.1mm to 1.5mm, which mainly contain iron, into a predetermined shape, laminating the sheets in the axial direction, and fixing the sheets by caulking, welding, or the like, as in the stator core 25. The permanent magnets are inserted into a plurality of insertion holes formed in the rotor core 29. The permanent magnets form magnetic poles. For example, ferrite magnets or rare-earth magnets are used as the permanent magnets.

In order to prevent permanent magnets from being axially extracted from stator core 25, upper end plate 30 and lower end plate 31 are provided at both ends of rotor 6 in the axial direction, that is, at the rotor upper end and the rotor lower end, respectively. The upper end plate 30 and the lower end plate 31 also serve as a rotation balancer. The upper end plate 30 and the lower end plate 31 are fixed to the rotor core 29 by a plurality of fixing rivets, not shown.

A shaft hole (not shown) into which the main shaft portion 18 of the crankshaft 7 is hot-fitted or press-fitted is formed in the center of the rotor core 29 in plan view. A plurality of through holes (not shown) are formed around the shaft hole of the rotor core 29 so as to penetrate substantially in the axial direction. Each through hole serves as one of the paths of the gas refrigerant discharged from the discharge muffler 20 to the space in the closed casing 2.

When the motor 4 is configured as an induction motor, a plurality of slots (not shown) formed in the rotor core 29 are filled with or inserted with conductors made of aluminum, copper, or the like. Further, a cage winding is formed in which both ends of the conductor are short-circuited by end rings.

Next, the operation of the compressor 1 will be described.

Electric power is supplied from the terminal 32 to the stator 5 of the motor 4 via the lead wire 28. Thereby, a current flows through the winding 26 of the stator 5, and a magnetic flux is generated from the winding 26. The rotor 6 of the motor 4 is rotated by the magnetic flux generated from the winding 26 and the magnetic flux generated from the permanent magnet of the rotor 6. The crankshaft 7 fixed to the rotor 6 rotates by the rotation of the rotor 6. The rotary piston 9 of the compression mechanism 3 eccentrically rotates in the cylinder chamber 13 of the cylinder block 8 of the compression mechanism 3 in accordance with the rotation of the crankshaft 7.

As described above, the space between the cylinder 8 and the rotary piston 9 is divided into two chambers, i.e., the suction chamber and the compression chamber, by the vane 10 of the compression mechanism 3. The volumes of the two spaces change with the rotation of the crankshaft 7. In the suction chamber, the volume is gradually enlarged, whereby low-pressure gas refrigerant is sucked from the suction muffler 21. In the compression chamber, the volume is gradually reduced, whereby the gas refrigerant in the compression chamber is compressed. Then, the compressed high-pressure high-temperature gas refrigerant is discharged from discharge muffler 20 into the space in sealed container 2. The discharged gas refrigerant further passes through the motor 4 and is discharged to the outside of the closed casing 2 from a discharge pipe 24 located at the top of the closed casing 2. The refrigerant discharged to the outside of the closed casing 2 passes through the refrigerant circuit and returns to the suction muffler 21 again.

Fig. 1 shows a compressor in which the vane 10 and the rotary piston 9 are formed separately, but there is also a swing type rotary compressor in which the vane 10 and the rotary piston 9 are integrally provided. The oscillating rotary compressor has a support body that supports the vane 10. The support body is formed of two columnar members having a semicircular cross section, and a receiving groove for receiving the blade 10 is formed between the two columnar members so as to be able to advance and retreat. The support body is rotatably fitted into a circular holding hole formed in an intermediate portion between the suction port and the discharge port of the cylinder 8. In the oscillating rotary compressor configured as described above, when the crankshaft 7 is driven, the vane 10 oscillates and advances and retracts in the radial direction in the receiving groove in accordance with the rotation of the rotary piston 9. The interior of the cylinder chamber 13 is thereby divided into a compression chamber and a suction chamber. The operation in the compression chamber and the suction chamber is the same as that in a compressor of a type in which the vane 10 and the rotary piston 9 are separate bodies.

Next, a characteristic structure of embodiment 1 will be explained.

Embodiment 1 is characterized by having a fixing structure for fixing the cylinder 8 to the inner peripheral surface of the closed casing 2. Hereinafter, the fixing structure will be described, and a method of manufacturing the fixing structure and effects obtained by the fixing structure will be described in order.

Fig. 2 is a sectional view a-a of fig. 1. In fig. 2, the closed casing 2 is not shown.

As shown in fig. 2, in embodiment 1, convex portions 33 extending in the circumferential direction are formed at a plurality of positions in the circumferential direction of the outer peripheral surface of the cylinder 8 with intervals. The convex portion 33 is formed by, for example, cutting a cast member formed by casting.

In fig. 2, as an example, the convex portions 33 are formed at three positions in the circumferential direction of the outer circumferential surface, but the number of the convex portions 33 can be changed as appropriate. In order to reliably fix the cylinder 8 to the inner peripheral surface of the closed casing 2, the convex portions 33 are preferably formed at three or more positions in the circumferential direction of the outer peripheral surface.

Fig. 3 is a side view showing a portion of the cylinder block of fig. 1.

The ratio of the total length L of the convex portions 33 in the circumferential direction to the outer diameter of the closed casing 2 is 5% to 50%. The circumferential length L and the axial width t of the convex portion 33 may be selected so that a desired fixing strength can be obtained according to acceleration and vibration generated at the fixing portion between the cylinder 8 and the sealed container 2. For example, when the fixing strength needs to be increased, the cross-sectional area of convex portion 33, that is, the area expressed by the product of length L and width t, may be increased, or the number of convex portions 33 may be increased.

Fig. 4 is a longitudinal sectional view of the main body of the hermetic container of fig. 1. Fig. 5 is a partial perspective view of the sealed container of fig. 1 as viewed from the inner peripheral surface side. Fig. 6 is a sectional view of a fixing structure of the hermetic container and the cylinder of fig. 1.

A fitting recess 34 is formed in the inner peripheral surface of the body 2b of the sealed container 2 at a position facing the projection 33 formed on the outer peripheral surface of the cylinder 8. The fitting recess 34 and the projection 33 are fitted to each other with interference, whereby the cylinder 8 is fixed to the inner circumferential surface of the body 2 b. In this example, since the convex portions 33 are formed at three positions at equal intervals in the circumferential direction, the fitting concave portions 34 are also formed at three positions at equal intervals in the circumferential direction. Thus, the number of fitting recesses 34 is the same as that of the projections 33, and the number can be appropriately changed according to the number of projections 33.

Further, a guide recessed portion 35 for guiding the convex portion 33 to the fitting recessed portion 34 when the convex portion 33 is interference fitted with the fitting recessed portion 34 at the time of manufacturing is formed on the inner peripheral surface of the body portion 2 b. The guide recess 35 is formed by a recess extending axially upward from the open end 2ba in the inner peripheral surface of the main body portion 2b and communicating circumferentially with the fitting recess 34 at an extending end portion. The depth of the fitting recess 34 and the guide recess 35 is determined by the height L and t of the projection 33 formed in the cylinder 8.

Next, a method of fixing the closed casing 2 and the cylinder 8 of the compressor 1 according to embodiment 1 will be described.

Fig. 7 is a developed view of the inner peripheral surface of the sealed container for explaining the method of manufacturing the sealed container of fig. 1.

As shown in fig. 7, the fitting recess 34 and the guide recess 35 are formed on one surface of the flat plate-shaped base material 40 by, for example, cutting. Then, the base material 40 is rounded and deformed into a cylindrical shape so that the surface on the side where the fitting recess 34 and the guide recess 35 are formed is inward. Then, both ends of the base material 40 are welded and joined to form the main body 2b of the closed casing 2.

In the step of fixing the cylinder 8 to the main body 2b of the closed casing 2, the main body 2b is heated from the outside, and the main body 2b is thermally expanded by the heating. After the main body 2b is thermally expanded, the cylinder 8 is inserted into the main body 2 b. Specifically, the cylinder 8 is inserted into the main body 2b such that the convex portion 33 formed on the outer peripheral surface of the cylinder 8 is positioned in the guide concave portion 35. Then, the cylinder 8 is moved in the main body 2b with the convex portion 33 along the guide concave portion 35, and the convex portion 33 is brought into contact with an end portion in the insertion direction of the guide concave portion 35. When the convex portion 33 abuts on the end portion of the guide concave portion 35 in the insertion direction, the cylinder 8 is rotated in the circumferential direction until the convex portion 33 abuts on the end portion of the fitting concave portion 34. When the convex portion 33 abuts on the end of the fitting concave portion 34, the body portion 2b after thermal expansion is cooled.

When the body portion 2b is cooled, the body portion 2b thermally contracts, and the convex portion 33 of the cylinder 8 is fitted into the fitting concave portion 34 with interference. That is, the convex portion 33 is fastened to the fitting concave portion 34 in the radial center direction from the inner peripheral surface of the main body portion 2b, and is also fastened to the fitting concave portion 34 in the axial direction. The outer peripheral surface of the other cylinder 8 is also fastened to the inner peripheral surface of the body 2b by thermal contraction.

Accordingly, the cylinder 8 is fixed to the main body 2 b. Here, the convex portions 33 are provided at equal intervals in the circumferential direction, and therefore the cylinder block 8 is fixed uniformly in the circumferential direction.

The following describes the effects of embodiment 1.

In the fixing structure of embodiment 1, the structure is such that: the main body 2b of the closed casing 2 and the cylinder 8 are fitted to each other by interference due to the concave-convex structure of the fitting concave portion 34 and the convex portion 33. Therefore, as in the conventional fixing method by spot welding, a plurality of local thermal shocks do not occur in the circumferential direction of the closed casing 2, and the closed casing can be uniformly fixed in the circumferential direction, and deformation of the inner diameter of the cylinder 8 can be suppressed. Therefore, leakage loss due to leakage of the refrigerant gas from the high-pressure compression chamber to the low-pressure suction chamber can be reduced, and therefore, the performance can be improved.

In the fixing structure of embodiment 1, the fitting concave portion 34 and the convex portion 33 have a concave-convex structure, and are positioned and fitted by interference in both the axial direction and the circumferential direction. Therefore, the movement of the cylinder block 8 in the circumferential direction and the axial direction after the hot-fitting can be reliably suppressed. Therefore, normal and excessive forces generated during operation of the compressor 1 can be resisted for long-term use of the compressor 1, and a highly reliable compressor can be obtained without causing the defects of positional deviation and falling-off of the cylinder block 8.

Further, since the guide concave portion 35 is provided on the inner peripheral surface of the main body portion 2b of the closed casing 2, positioning and insertion work can be easily performed when the cylinder 8 is inserted into the main body portion 2b and the convex portion 33 is fitted into the fitting concave portion 34. I.e. has the effect of ease of assembly.

Further, if the stator 5 of the motor 4 is simultaneously shrink-fitted, the number of steps for manufacturing the compressor 1 can be reduced, and therefore, the cost can be reduced.

In addition, although the configuration of the present invention has been described above as being applied to a rotary compressor having one cylinder with one compression chamber, the present invention can also be applied to a multi-cylinder rotary compressor, a swing rotary compressor, or a rolling compressor.

Description of reference numerals: 1 … compressor; 2 … sealing the container; 2a … upper cover; 2b … body portion; 2c … lower cover; 3 … compression mechanism; 4 … electric motor; 5 … stator; 6 … rotor; 7 … crankshaft; 8 … cylinders; 9 … rotary piston; 10 … blade; 11 … main bearing; 1 … secondary bearing; 13 … cylinder chamber; 14 … vane slots; 15 … backpressure chamber; 16 … eccentric shaft portion; 17 … leaf spring; 18 … a main shaft portion; 19 … secondary shaft portion; 20 … discharge muffler; 21 … suction muffler; 22 … suction tube; 23 … refrigerator oil; 24 … discharge pipe; 25 … stator core; 26 … winding; 27 … an insulating member; 28 … a wire; 29 … rotor core; 30 … upper end plate; 31 … lower end plate; a 32 … terminal; 33 … protrusions; 34 … fitting recess; 35 … guide recess; 40 … base material.

Claims (2)

1. A compressor in which a compression mechanism for compressing a fluid is fixed to an inner peripheral surface of a closed casing,

in the compression mechanism, a plurality of protrusions extending in the circumferential direction are formed on an outer circumferential surface of the compression mechanism, the outer circumferential surface being in contact with an inner circumferential surface of the closed casing, the protrusions being spaced apart in the circumferential direction,

the closed container has a structure in which: and a guide concave portion which guides the convex portion of the compression mechanism to the fitting concave portion at the time of manufacturing, the guide concave portion extending in an axial direction from an opening end of the cylindrical closed container and communicating with the fitting concave portion in a circumferential direction at an extending end portion, the compression mechanism being fixed to an inner circumferential surface of the closed container in a state where the convex portion of the compression mechanism is fitted in the fitting concave portion.

2. The compressor of claim 1,

the compression mechanism is provided with: the rotary compression mechanism includes a cylinder block having a cylinder chamber and a rotary piston eccentrically rotating in the cylinder chamber, and the projection is formed on an outer peripheral surface of the cylinder block.

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